Double-walled vessel with a space for a vacuum between the walls.



'PATENTED DEC. 3, 19.07.

IR. BURGER. DUUBLB WALL'ED VESSEL WITH A SPACE FOR A VACUUM BETWEEN THE WALLS.

APPLICATION I ILED 00123, 1906.

2 SHEETS-SHEET 1- Z wx'miissis.

R JW 2% W M U v5 L 0* H m% E OW PATENTED DEC. 3, 1907.

R. BURGER. DOUBLE WALLED VESSEL WITH A SPACE FOR A VACUUM BETWEEN THE WALLS;

APPLIOATION FILED 0012s, 1906.

2- SHEETS-SHEET 2.

O-| TR NE E o B D L O H N B on WITNESSES BY MRS-M Atiufue LLK To' all 'lbhont wiagi concern:

nEmnoLn BURGER, OF-BERLIN, GER-MANY, Assrcron, Brmissus-Assrcminn'rs, 'ro' AMERICAN THERM'OS BOTTLE COMPANY,

or NEW .ron'K, 51.1., a oonron-i'rron or;

DOUBL -warmer vnssnr. wrrn'a sracn non liwac nftm-Iiinrwnnn'rnniwshnsg.

mem 1 Be it known'that I, REINnoLn BURGER, a

subject of the Cie'rman l'fhnperor, and a resident of Berlin, in the German Empire, have I provide a double 'wa lied vessel of the kind stiffening material within the space between or stiffening. niaterialconsists-of-a pluimmaterial betweenthe walls'of a double su zh strengthening' 'or stifiening bodies have npmousl acted upon theimetal coatingof A may present invention, however, the stiiien air ' board, cork; and thelike poor conductors of l recesses provided m one' or both of the walls unevenness-es or proixections within the rare-' invented certain new and useful. Improve- ,mentsin Double-Walled Vessels witlra S ace .1 .for Vacuum Between I the 'Walls,- of w iic-h the following is a full, clear, and exact description. The ob3ect of! my res'e'n't invention is to specified, and to provide strengthening-"or.

saidwalls.

In the form preferred by me, the strength-1 rslity pf independent elastic stiiiene'r's held H1 position between thewalls by means of fied space between t e inner and outer walls ofthe'vessel. A.

I am aware that it has beenheretofore pro-- posed to insert ,stifiening or strengthening walled vessel of the kind mentioned, and

said vessc s; it has been diiiicult and trouble specification of iettersiatent. 1 minim filed omega, 190s. -'s. rin' ammonia the outer'wall forming internal.

' raster ia'e'legieo'ri i thereofon-the r 'x;=ng; .iuaaatt-i. another embodiment of my invention;- and Fig; 6 is a section-thereof-on the line 5:5

and-4 .is semand Fi s. 19 and'lli-ai evieiysg; o F respectively on longitu'dmaland'cross "sections,ofIfig.9. jThev-essel' hown in'iFigs; landfl is'd uble' walled arid has-a convex 'b'ottonlj' 'and n': con 'strictedneck but it-ma'y be ofiother desired;

: shape.- -.Between; thei itwo wallsj inelo'sjin "1 a 2 pressions bin the outer wall,- orniing intern 1 5* projections arranged inlgroiipsaroundieacntd of. thesaid 'stnfernngTbodws a, Zwhich arethereb retained inposit1on.'

which engage in'the'stiffeni ho es ,-a.i.-.;In Fi s. 5 and 6, the *stifie odiesaiareofig spherical form and are :separated;fro another by webs (noti-shownthegdrawing) and are held in' position inlanannularfrecess 30 some to attach such bodies. and secure them 1' formed inone of the'walls", of the vessel {the in desired position, and the suspending means outer wall c as illustrated).--"

employed such as nires'iand the likehave; greatly impaired the vacuum. According to ing or strengthening bodies (preferably of slightly elastic material, such as asbestos,

heat) are held in positionby projections or bodying m .vention, and Fig. l is a section Referring to 7 and stiffening .5

bodies a, se arate' as aforesaid, by' webs, are

held in position not onl by an annular re,

eess f in the outer-wallut also byanother-i annular recess 9 m the inner wall oppositeto thatintheouterwall. Fi 9, 10 and :11 show' a field flask' i nwhic a vessel as:her'einl')efore described 1 s- 99 .-u'sed.' In the ari'a 'enient shown in thesefigures the stifiening odies arefheldin'position and prevented fi'om shift' q u a like .projections-i formedon the nside-ofthe outer wall and'entering'the:saidstifien bodies." The double wal1fvejssel is ii elose in a casing 7c of any suitable 'rnateri a1 such as sheet metal, or leather, provided with a car-- 0 belt .71, the vessel 'resti at its lower 2 end on a bed of elastic material in the casing 1&0 1c and being surrounded, at the neck, by an elastic ring; m. A hollow glass stopper n (the upper half of which is-1nclo'sed-'1n bad conductor of heatcontained in a cap 9) 1s g ieet ns .75

buttonb essd' down by means of scaP-jpflcmwdi ontolthe upper part of the casing 1c, which 'capimayhe-l sed as a drinkirigcup; 'The .stoppeii' i's providedwith a washer of elastic 5 material which presses on the edge-of the .mouth of the vessel, and insures-an ai'rvtight closure thereof.

Havi

.no'w particularly described and aspertains the nature 'of mysaid inveiition and-j 10 in what manner the same'is to be performed- I declare that what claim is! double walls of lass united-With eaeh other onlyat the moufii of said vessel and inclosing ,25 provided on the adjacent surfaces of. saidi Walls at about the same height Within said spae'e, and stiflening bodies disposed 'betweegr said walls arid engaging the unevn'nesses re 1Q A v'ess 1, comprising in combination,

of said vessel andir elosing ferred to a and ke t'in iesitibn thereby,"

stai tially as set orth.

3. 'A vessel,- comprising in combinatiig? doi hletwalls of lass united with each other only at the moutr h of said vesseland .i iclosing betweenthem a rarefied space a: projection 011 a surface (sf-on of said wads-within said 35- space, and a stiffening body disposed be tween; said walls and engagin and kept inn by saidrprojieetion su stan'tiallyfas set forth;

4,= A- vessel, eomprising .in combination, 40

double walls ofiglass united .with each other atthe'kmouth 0 said vessel and inelosingia rarefied spac 'be'tween them, and projetgtions' *onthe surfaceslrof said Walls atahoutzthej- .s ame height within said'space, arid-separate so stiflening bodies disposedvbetween said walls "and eaeh engaging and kept-in ositio n b'y-.

1 projection, substantially asset 011th Y -In 'witii efss whereofI- have hereunto signed m ha tnfeithis-tenth day'of'October 1906;; 'iii' v the-"oreseiice of two-subscribing witnesses,

4 REI NHOLD'B URG ER;

Witnesses': i I

Wommm HENRY" HAsBE 

